They will fill vacancies left by the departures of Ald. Toni Preckwinkle (4th), Ed Smith (28th) and Tom Allen (38th). Preckwinkle was elected president of the Cook County Board, while Smith and Allen retired. Allen was sworn is as a circuit court judge last month

The three appointments have to be approved by the full city council and were chosen through an online application process. The mayor said a total of 16 people applied.